Laserfiche WebLink
Geologic Description for Drill Hole 874E <br /> Nucla Mine, Montrose County, Colorado <br /> Hole Number: 874E Associated Wells : GW-N24(WM0024) <br /> Date Drilled: 4/21/86 Location: T47N,R15W, SW4,NW; <br /> Drilled By: Alan Chiles Section 31 <br /> Logged By: Gary Wendt Coordinates: 603,815' N <br /> 1,118,342' E <br /> Elevation: 5764' <br /> Depth Increment Description of Strata <br /> (feet) <br /> 0.0- 0.3 SOIL, reddish brown, friable, ME/VE <br /> 0.3- 2.0 SANDSTONE, light grayish brown to brown, extremely <br /> hard, VE <br /> 2.0- 4.0 SHALE, gray, hard, SE/ME, extremely hard sandstone <br /> at 2.0-2.4 <br /> 4.0- 7.4 SHALE, very dark gray, slightly hard and soft black <br /> COAL and carbonaceous SHALE (weathered Upper Dakota <br /> seam) , NE <br /> 7.4- 9.0 SANDSTONE, light gray, slightly hard, gray shale at <br /> 7.4-7.6, NE <br /> 9.0-13.0 SANDSTONE, brown, slightly hard to hard, NE, <br /> sandstone strata continues to 13.2 <br /> 13.0-15.7 SHALE, gray to dark gray, slightly hard to hard, NE, <br /> powdery yellow sulfur stains (Jarosite) in <br /> fractures, 50 percent light gray sandstone at <br /> 15.55-15.70 <br /> 15.7-23.5 COAL, Lower Dakota seam, slightly hard light gray <br /> silty shale parting with powdery yellow sulfur <br /> stains (Jarosite) at 15.95-16.25, light gray silty <br /> shale streak at 17.36-17.44 and 17.53-17.57, NE <br /> 23.5-23.9 SHALE, dark grayish brown, slightly hard, NE <br /> 23.9-26.8 SANDSTONE, light gray, hard with 35 percent slightly <br /> hard gray shale streaks, NE <br /> 6-1 -52 <br /> Revised 11/01/86 <br />